Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
61, С. 104914 - 104914
Опубликована: Авг. 3, 2024
This
work
employs
an
approach
to
examine
the
effects
of
adding
alumina
nanoparticles
with
varying
diameters
(dp)
water
on
productivity
cold
storage.
Utilizing
a
finned
geometry
curved
wall,
mesh
configuration
was
adapted
solid
front's
location,
and
unsteady
terms
were
discretized
using
implicit
methods.
The
concentration
(ϕ)
also
evaluated
as
key
parameter.
Results
indicated
that
increasing
improved
storage
efficiency
by
approximately
42.11
%.
Among
various
sizes,
medium-sized
most
effective,
yielding
20
%
improvement
in
freezing
compared
smallest
size.
Optimal
nanoparticle
dispersion
significantly
reduced
required
cooling
time
from
9383.58
s
5507.129
s.
study
highlights
substantial
benefits
combining
fins
enhance
systems,
presenting
notable
advancement
thermal
management
technology.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
58, С. 104410 - 104410
Опубликована: Апрель 18, 2024
The
present
attempt
investigates
solidification
through
a
tank
equipped
with
T-shaped
fins,
crucial
aspect
of
cold
storage
technology.
Utilizing
the
Finite
Element
Method
(FEM)
for
simulation,
implementation
mesh
adaptation
technique
enhances
accuracy
modeling.
Equations
are
derived
based
on
assumption
neglecting
velocity
effects
during
solidification,
simplifying
mathematical
framework
analysis.
Validation
numerical
approach
is
conducted
comparisons
previously
published
works,
affirming
reliability
methodology.
A
notable
study
utilization
nanosized
powders
dispersed
within
water,
serving
to
bolster
system
performance.
This
innovative
water
conductivity,
thereby
augmenting
rate
storage.
Employing
greater
shape
factor
yields
promising
results,
leading
discernible
decrease
in
completion
time
by
approximately
10.6%,
attributed
heightened
conductivity
facilitated
nanomaterial.
Furthermore,
investigation
explores
impact
varying
volume
fractions
particles
time,
revealing
significant
reduction
32.78%
higher
particle
volumes.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
57, С. 104287 - 104287
Опубликована: Март 24, 2024
To
maximize
the
efficiency
of
freezing,
combinations
using
nanoparticles
and
fins
have
been
utilized
in
current
work.
Incorporating
nanofluids
into
solidification
processes
provides
a
refined
efficient
approach
to
transitioning
materials
from
liquid
solid
state.
Triangular
container
involving
has
implemented.
The
shape
fraction
were
varied
this
research.
derived
equations
solved
via
finite
element
method
associated
code
validated
based
on
prior
article.
reduction
freezing
time
was
presumed
as
main
goal
research
resource
utilization
various
industries.
As
greater
amount
nano-powders
is
utilized,
conduction
becomes
stronger
rate
improves
about
27%.
Also,
altering
particles
applying
powders
with
bigger
m
can
lead
by
7%.
Case Studies in Thermal Engineering,
Год журнала:
2023,
Номер
53, С. 103928 - 103928
Опубликована: Дек. 20, 2023
This
article
explores
the
acceleration
of
discharge
speed
through
introduction
nanoparticles.
Utilizing
simulations
based
on
Galerkin
method,
study
has
developed
and
examined
effects
various
variables.
The
utilized
tank
been
equipped
with
fin
additives
shape
factor
(m)
volume
fraction
(ϕ)
have
dispersed
into
water.
denser
mesh
near
ice
front
was
considered
in
each
time
stage
involving
adaptive
grid
approach.
Also,
a
validation
test
presented
to
illustrate
precision
modeling.
Contours
curves
for
different
ranges
parameters
were
exemplified
results.
quickest
process
takes
641.19s
while
longest
877.17s.
Increasing
m
causes
conductivity
increase
enhances
about
6.96
%.
Moreover,
augmenting
value
ϕ
makes
period
reduce
26.9
Journal of Thermal Analysis and Calorimetry,
Год журнала:
2024,
Номер
149(11), С. 5595 - 5609
Опубликована: Май 27, 2024
Abstract
In
pursuit
of
advancing
the
efficiency
cold
energy
storage,
a
uniquely
designed
curved
container
has
been
employed,
filled
with
water-nanoparticle
mixtureQ.
The
is
equipped
fins,
strategically
leveraging
enhanced
conduction
facilitated
by
presence
nanoparticles.
simulation
intricate
unsteady
phenomena
in
this
study
conducted
using
finite
element
technique,
providing
robust
analytical
framework.
incorporation
an
adaptive
grid
ensures
refined
resolution,
particularly
vicinity
ice
front
region.
nanoparticle
fraction
(
ϕ
)
emerges
as
pivotal
factor
directly
influencing
rate
solidifying.
dispersion
nano-powders
leads
to
noteworthy
reduction
completion
time,
demonstrating
substantial
33.21%
improvement.
diameter
(dp)
introduces
diverse
effects
on
solidification
process,
primarily
due
its
significant
influence
conductivity
nanomaterial.
An
in-depth
exploration
impact
dp
reveals
compelling
insights.
As
increases
from
smallest
size
40
nm,
there
commendable
15.12%
required
freezing
time.
However,
subsequent
increment
beyond
threshold
results
notable
36.56%
increase
findings
presented
here
not
only
contribute
fundamental
understanding
processes
but
also
hold
practical
implications
for
design
and
optimization
storage
systems.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
57, С. 104296 - 104296
Опубликована: Март 23, 2024
This
study
conducts
a
simulation
of
the
freezing
through
container
featuring
finned
sinusoidal
geometry.
The
application
Galerkin
method
effectively
captures
intricate
dynamics
unsteady
processes,
showcasing
significant
enhancement
by
introducing
nanoparticles
to
augment
system's
thermal
conductivity—an
essential
element
for
optimizing
conduction
efficiency.
numerical
approach
underscores
importance
employing
an
adaptive
grid
in
scenarios,
tailoring
based
on
solid
front's
position
due
heightened
scalar
gradients.
Various
powder
diameters
(dp)
and
fractions
(ϕ)
are
systematically
investigated,
elucidating
their
distinct
impacts
process
duration.
Results
reveal
that
initial
increase
dp
causes
decrement
period
19.93%,
followed
subsequent
rise
49.06%,
specifically
scenarios
with
0.04
nanoparticle
concentration.
incorporation
yields
noteworthy
41.13%
decrease
solidification
time
when
optimal
sizes
utilized.
In
contrast,
without
additives
is
278.95s,
reduced
164.19s
introduction
optimally
sized
powders.
Case Studies in Thermal Engineering,
Год журнала:
2023,
Номер
53, С. 103815 - 103815
Опубликована: Дек. 2, 2023
This
research
investigates
the
integration
of
a
thermoelectric-enhanced
cooling
elliptic
duct
into
photovoltaic
solar
system.
Employing
finite
volume
method,
simulation
aims
to
analyze
system's
performance.
Furthermore,
introduction
magnetic
field
is
explored
as
strategy
boost
electricity
generation
and
overall
system
efficiency.
The
study
driven
by
pursuit
enhanced
energy
conversion
thorough
comprehension
complex
dynamics
within
configurations.
nanofluid
laminar
flow
has
been
affected
force
better
achieved.
Impacts
Wdust
(amount
dust),
Vi
(inlet
velocity
tube),
Ha
(Hartmann)
φ
(fraction
additives)
on
thermal
(ηth)
electrical
(ηe)
performance
have
discussed
in
output
section.
With
deposit
dust,
ηth
ηe
decrease
about
9.07
%
23.5
%.
rise
Ha,
uniformity
temperature
over
silicon
layer
improves
amounts
increase
1.18
6.85
%.With
mixing
water
with
nanoparticles,
panel
enhances
positive
effect
65.73
7.35
elevate
Vi,
view
ηth,
respectively.
enhancement
80.81
15.1
for
greater
Vi.
As
intensifies,
occurs
4.03
30.26
Achieving
uniform
distribution
across
crucial
assessing
its
Increasing
leads
substantial
improvement
uniformity,
enhancements
approximately
47.35
4.66
%,
indicates
more
balanced
heat
distribution,
which
indicator
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
56, С. 104259 - 104259
Опубликована: Март 13, 2024
This
research
zeroes
in
on
improving
the
freezing
process
by
synergistically
employing
a
wavy
wall
and
fins.
To
enhance
cold
penetration,
phase
change
material
(PCM)
is
enriched
with
nanoparticles,
single-phase
model
adopted
due
to
low
nanoparticle
concentration.
The
numerical
simulations
leverage
Galerkin
method
validation
procedure
affirms
precision
of
code,
extensively
evaluating
impacts
ϕ
(concentration
additives)
dp
(particle
diameter).
With
an
increase
particle
diameter
(dp),
there
initial
19.76%
decrease
required
time,
succeeded
subsequent
50.56%
when
=
0.04.
Furthermore,
escalation
results
11.04%,
40.91%,
26.36%
reduction
completion
time
for
values
50,
40,
30
nm,
respectively.
Without
inclusion
powders,
solidification
lasts
84.8
s.
However,
introduction
optimal
powder
size,
this
duration
significantly
reduces
50.1
emphasizes
efficiency
improvements
attained
through
strategic
integration
wall,
fins,
PCM
infused
nanoparticles.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
61, С. 104850 - 104850
Опубликована: Июль 18, 2024
In
current
study,
Galerkin
techniques
have
been
utilized
to
model
the
freezing
behavior
of
a
cold
storage
unit.
The
system
features
fins
and
porous
foam,
enhancing
its
efficiency
in
solidifying
liquids.
Additionally,
hybrid
nanoparticles
introduced
into
water
improve
conductivity.
energy
equation
has
augmented
with
new
term
for
radiation
mode,
alongside
source
freezing.
With
goal
determining
amounts
scalars
at
each
node,
consists
two
equations.
Mesh
adaptation
employed
accommodate
dynamic
nature
process.
Validation
against
previous
data
demonstrates
good
agreement,
bolstering
reliability
simulation.
introduction
foam
domain
results
significant
enhancement
rate,
an
increase
about
90.75
%.
Furthermore,
scenarios
without
mixing
nano-powders
surge
factor
contribute
notable
reductions
completion
time,
decreases
approximately
12.52
%
8
%,
respectively.
By
combining
all
these
techniques,
considerable
reduction
solidification
time
can
be
achieved,
amounting
around
91.46
This
highlights
importance
comprehensive
approach
improving
efficiency.
units
through
advanced
this
research
contributes
sustainable
use
natural
resources,
highlighting
potential
reducing
consumption
minimizing
environmental
impact.
